From a line sketch to buses and cost

In one sentence

Change the service — see the fleet and cost immediately.

Why it matters

A new line is drawn and its stops placed. The planner sets 05:30–23:30 every 8 minutes; the platform writes the timetable, turns it into trips and chains the trips into vehicle blocks — one row per vehicle — giving 18 vehicles, vehicle-hours, vehicle-km and deadheading. Change the headway to 6 minutes and everything is rebuilt: 23 vehicles and the operating cost that goes with them.

Most of what a transit planner does before a model run — drawing, scheduling, checking reach and cost — is where time is lost between the big model iterations. Seeing that step on a map, with the numbers following the sketch, is what makes the workflow believable.

Sources

• Schematic, synthetic city (not a real network or tile map); values are illustrative
• Vehicle blocks computed by chaining trips with terminal tracking; running time 64 min, layover 5 min, 18 km

What you see

1. 00.7Draw the line
2. 03.1Place the stops
3. 04.8Set the service
4. 05.8Timetable
5. 07.8Trips on the time axis
6. 09.9Trips chained into vehicle blocks
7. 11.618 vehicles and resources
8. 14.6Headway 8 → 6 min
9. 17.2Operating cost

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